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Manual operations
FK 3-1 / FK 3-06 motor-wound spring
operating mechanism
21.5.2003
© ALSTOM
48.020.181E/2
3/26
Introduction
This manual describes the following manual operations:
• Slow closing
• Slow opening
• Manual discharge of closing spring
Manual operations as described in these instructions are not necessary in
the course of installation or in normal circuit breaker operation.
The circuit breaker can be slowly closed or slowly opened as required for
adjustment and inspection purposes.
In order to remedy a problem after improper manipulations or in case of
circuit breaker malfunctions, the equipment can be slowly closed or slowly
opened or the closing spring can be manually discharged.
Safety
The 70.00 motor-wound spring operating mechanisms feature state-of-the-
art design and high operational reliability. They can nevertheless pose a
hazard if used improperly.
The circuit breaker operator must therefore ensure that assigned personnel
• Is familiar with locally and nationally applicable safety and accident-
prevention regulations, particularly as applicable to high-voltage
switchgear and other high-voltage equipment
• Is aware of and comply with the contents of these instructions
• Has received technical training on circuit breakers, including operating
mechanisms
• Observes safety instructions affixed to the apparatus
• Has the duty immediately to report any changes that interfere with safety
Necessary conditions
for performance of
manual operations
• The circuit breaker is in open position.
• The circuit breaker is earthed on both sides.
• The control voltage is disconnected.
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